PORBEAGLE
Lamna nasus M. Ir. Craosaire sgadan; Fr. Taupe; Ge. Heringshai; Du. Harringhaai; It. Smeriglio; Sp. Cailon, Marrajo. Body stout, gill-slits and eye rather large. Tail-fin set vertically, with the upper lobe somewhat the larger. A keel on each side of the tail column and a smaller seco ndary keel on the tail below it. Second dorsal small, placed over the anal fin. Teeth long, slender with (in the adult) small secondary cusps at their base. Brownish or greyish. Grows to over 400 lb.

MAKO
Isurus oxyrinchus M. Fr. Mako; Ge. Makrelehai; It. Squalo mako; Sp. Marrajo. Rather like porbeagle, but less stoutly built and with a smaller eye. Tailfin more symmetrical, without small secondary keel. Small second dorsal fin in advance of anal fin. Teeth long, slender, without basal cusps. Bluish in colour. Grows to over 1000 lb.

BLUE SHARK
Prionace glauca M. Ir. Craosaire gorm; Fr. Requin bleu; Ge, Blauhai; Du. Blauwe haai; It. Verdesca; Sp. Tintorera. Slender shark with small gill-slits, raked-back tail and very long, slender pectorals. Teeth triangular, with a finely serrated cutting edge. Vivid blue above when fresh caught. Grows to several hundred pounds in weight.

TOPE
Galeorhinus galcus M. Ir. Fhmaire; Fr. Milandre, Ha; Ge. Hundhai; Du. Ruwehaai; It. Canesca; Sp. Cazon, Tollo. Small greyish shark, with short triangular pectorals and a short, deep notch in the tail-fin. Cutting teeth. Grows to more than 70 lb.

SMOOTH HOUNDS
M. Fr. Emissole; Ge. Glatthail. Du. Toorthaai; It. Palombo; Sp. Musola. Resemble clumsily built tope-like shark with, at most, a shallow notch in the tailfin. Teeth adapted for crushing rather than cutting, in beds like those of a skate. Two European species: (1) Mustelus mustelus. Plain grey. Its status as an Irish species is uncertain. (2) Mustelus asterias. Grey sprinkled with small, pale spots. Not uncommon. Grows to about 4 feet.